| 词条 | 2013 AZ60 | |||||||||||||||||
| 释义 |
| minorplanet = yes | background = #C2E0FF | name = {{mp|2013 AZ|60}} | discovery_ref = [1] | discoverer = Mt. Lemmon Survey | discovered = January 10, 2013 | mp_category = trans-Neptunian object centaur (DES)[2] Oort cloud object | orbit_ref = | epoch = 2017-Sep-04 (JD 2458000.5) | uncertainty = 1 | observation_arc = 5.20 yr | semimajor = {{Convert|562|AU|Tm|abbr=on}} (a) | perihelion = {{Convert|7.920|AU|Tm|abbr=on}} (q) | aphelion = {{Convert|1116.9|AU|Tm|abbr=on|lk=on}} (Q) | eccentricity = 0.98592 (e) | inclination = 16.532° (i) | asc_node = 349.20° (Ω) | arg_peri = 158.42° (ω) | period = 13339 yr | mean_anomaly = 0.07458° (M) | jupiter_moid = {{Convert|2.58|AU|Gm|abbr=on}} | saturn_moid = {{Convert|1.20|AU|Gm|abbr=on}}[4] | mean_motion = 0.000050074°/day (n) | satellites = 0 | dimensions = ~40 km[5] 62.3 ± 5.3 km[1] | abs_magnitude = 10.2[4] | magnitude = 19.8 | sidereal_day = 9.39 ± 0.22 hours[1] | albedo = 0.029[1] }} {{mp|2013 AZ|60}} is a small Solar System body (extended centaur)[4] from the scattered disk or inner Oort cloud. {{mp|2013 AZ|60}} has the 8th-largest semi-major axis of a minor planet not detected outgassing like a comet[12] ({{mpl|2013 BL|76}}, {{mpl|2005 VX|3}} and {{mpl|2012 DR|30}} have a larger semi-major axis). {{mp|2013 AZ|60}} came to perihelion in November 2014 at a distance of 7.9 AU from the Sun (inside of the orbit of Saturn). With an absolute magnitude (H) of 10.2,[4] {{mp|2013 AZ|60}} has an estimated diameter of 40 km.[5] Comet Hale–Bopp, which is roughly the same size, was not discovered until it was 7.2 AU from the Sun and had started outgassing CO. {{mp|2013 AZ|60}} may be discovered to be cometary as it comes to perihelion. It comes to opposition at the start of April.After leaving the planetary region of the Solar System, {{mp|2013 AZ|60}} will have a barycentric aphelion of 827 AU with an orbital period of 8500 years. In a 10 million year integration of the orbit, one of the 3-sigma clones is ejected from the Solar System.[2]
Physical characteristics and orbitA 2016 study found {{mp|2013 AZ|60}} to have a comet-like albedo of 2.9% (darker than any other known ejected centaur) and a color typical of D-type asteroids. It is unknown if it is a so-called "super comet" or an extinct comet, considering its large distance from the Sun. It was also determined that {{mp|2013 AZ|60}} has a diameter of 62.3 ± 5.3 kilometers, larger than initially believed. A light curve analysis found it to have a rotation period of 9.39 ± 0.22 hours, typical of asteroids its size. No significant satellites were detected. It was also found that {{mp|2013 AZ|60}} is on an extremely unstable orbit, with a ~64% chance of being ejected from the Solar system in 1 million years, and a ~25% chance of being ejected in the next 500,000 years, as well as a 4.2% chance of its orbit venturing into the neighborhood of Earth.[1] Comparison{{clear}}See also
References1. ^1 2 3 {{cite journal|last1=Pál|first1=Andras|title=Physical properties of the extreme centaur and super-comet candidate 2013 AZ60|journal=Astronomy & Astrophysics|date=2016-07-20|arxiv=1507.05468}} [2][3][4][5][6]2. ^1 {{cite web|title = 2013 AZ60|publisher = Seicchi Yoshida's Home Page|url = http://www.aerith.net/comet/catalog/2013AZ60/2013AZ60.html|accessdate = 2013-07-13}} 3. ^1 2 3 4 {{cite web| title = 2013 AZ60 Orbit| publisher = IAU minor planet center| url = http://www.minorplanetcenter.net/db_search/show_object?object_id=2013+AZ60| archiveurl = https://web.archive.org/web/20160215052643/http://www.minorplanetcenter.net/db_search/show_object?object_id=2013+AZ60 |archivedate=2016-02-15 |deadurl=no| accessdate = 2018-02-03}} 4. ^1 {{cite web |title=JPL Small-Body Database Search Engine: Asteroids and a > 100 (AU) |publisher=JPL Solar System Dynamics |url=http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=ast;obj_numbered=all;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Bh;c1_op=%3E;c1_value=100;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsCkCqAi;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&query=1&c_sort=BhD |accessdate=2013-10-13}} 5. ^1 2 {{cite web |title=Absolute Magnitude (H) |publisher=NASA/JPL |url=http://neo.jpl.nasa.gov/glossary/h.html |accessdate=2013-10-13}} 6. ^1 2 {{cite web |author = Marc W. Buie |title = Orbit Fit and Astrometric record for 13AZ60 |publisher = SwRI – Space Science Department |url = http://www.boulder.swri.edu/~buie/kbo/astrom/13AZ60.html |accessdate= 2017-02-15 |archiveurl= https://web.archive.org/web/20160327184916/http://www.boulder.swri.edu/~buie/kbo/astrom/13AZ60.html |archivedate= 2016-03-27 |deadurl = no}} }} External links
4 : Extended centaurs|Inner Oort cloud|Minor planet object articles (unnumbered)|Astronomical objects discovered in 2013 |
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